Interesting, I have problems with my lower back popping out or thats what it feels like but I just lay on a tennis ball or a folded washrag or hand towel. If you try it let us know how it works.

__________________Pay no attention to the fat girl hiding behind her keyboard. She is the great and powerful blubber butt!
It's not the minutes spent at the table that put on weight, it's the seconds.
Opportunity may knock only once, but temptation leans on the doorbell.
If at first you don't succeed, then quit. There's no use being a damn fool about it. W.C. Fields